CN2578806Y - LCD digital thermometer with solar power supply - Google Patents
LCD digital thermometer with solar power supply Download PDFInfo
- Publication number
- CN2578806Y CN2578806Y CN 02284291 CN02284291U CN2578806Y CN 2578806 Y CN2578806 Y CN 2578806Y CN 02284291 CN02284291 CN 02284291 CN 02284291 U CN02284291 U CN 02284291U CN 2578806 Y CN2578806 Y CN 2578806Y
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- China
- Prior art keywords
- solar cell
- chip microcomputer
- solar
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- digital display
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- Expired - Fee Related
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The utility model relates to an LCD digital display thermometer with a solar power supply, which comprises a temperature sensor III connected with the input end of the I/O port of a single chip computer I, an LCD display IV connected with the output end of the I/O port of the single chip computer I, and a power supply circuit II connected with the VDD end and the VSS end of the single chip computer I. The utility model is characterized in that the power supply circuit II comprises a solar cell SP, a light emitting diode LED, an electrolytic capacitor C, and a voltage detection sheet U1 connected between the positive electrode and the negative electrode of the solar cell SP, wherein the solar cell SP, the light emitting diode LED and the electrolytic capacitor C are connected in parallel. The utility model has the advantages of energy saving, environmental protection and long-term, stable and continuous work.
Description
(1) technical field
The utility model relates to a kind of thermometer, relates to a kind of solar powered LCD digital display thermometer specifically.
(2) background technology
The LCD digital display thermometer of prior art all adopts traditional powered battery, in use, along with the consumption (life-span of general small-capacity cells is about 1 year) of the energy content of battery, the reduction gradually of output voltage, also deepening gradually of the brightness of LCD (LCD), and the circuit reliability of operation is reduced, cause the increase of thermometric error.When voltage is lower than a certain numerical value, thermometer will lose the function of operate as normal.
(3) summary of the invention
The purpose of this utility model provides a kind of energy-saving and environmental protection advantage that not only has with regard to being to overcome above-mentioned weak point of the prior art, and can be for a long time, the solar powered LCD digital display thermometer of continuous working stably.
The purpose of this utility model can adopt following measure to realize:
Solar powered LCD digital display thermometer of the present utility model, it comprises the temperature sensor III that is connected with the I/O mouth input end of single-chip microcomputer I and is connected the LCD display IV of the I/O mouth output terminal of single-chip microcomputer I, and the power circuit II that is connected with the power input of single-chip microcomputer I, described power circuit II comprises solar cell SP, LED, the electrochemical capacitor C that is connected with parallel way, and is connected the voltage detecting sheet U1 between solar cell SP positive pole and the negative pole.
The vdd terminal of voltage detecting sheet U1 among the II of power circuit described in the utility model is connected with solar cell SP positive pole, its GND end is connected with solar cell SP negative pole, the OUT end is connected the vdd terminal of single-chip microcomputer, and solar cell SP negative pole is connected the VSS end of single-chip microcomputer.Its principle of work is: solar cell produces electric energy under the irradiation of light, and the voltage at two ends raises along with the increase of illuminance.When the process of the night under unglazed photograph to daybreak, illuminance is a process of strengthening gradually, and the output voltage of its solar cell also is a process that rises gradually, from 0.01V ... 0.9V ... 1.5V ... 2.1V ...In this process that rises gradually, when output voltage reaches single-chip microcomputer initialization voltage (generally at 0.9V), single-chip microcomputer resets, start working, because working current increases severely under low-voltage state, the solar cell output voltage descends, and makes the single-chip microcomputer cisco unity malfunction.After adopting the voltage detecting sheet, have only when the output voltage of solar cell reaches the threshold voltage 1.3V of voltage detecting sheet, voltage detecting sheet just conducting is powered to single-chip microcomputer, can make the stable work of single-chip microcomputer.Be connected a light emitting diode at single-chip microcomputer VDD with the two ends forward of VSS, higher in illumination, when the solar panel both end voltage was higher than 1.5V, the light emitting diode conducting was stabilized between the 1.5V-1.6V single-chip microcomputer magnitude of voltage.In the parallel connection of the two ends of solar cell an electrolytic condenser, for single-chip microcomputer the sampling transient state bigger electric current is provided.Single-chip microcomputer general work electric current is 5 μ A, and the sampling transient state is 30 μ A, because the output current of solar cell is limited, when the sampling transient state, cause the solar cell output voltage to descend, the numeral meeting of LCD display " thin out suddenly " by black once, the numeral concerning people's vision on the LCD screen is " flashing "; The big electric current that adds transient state after the capacitor C is provided by the C discharge, makes LCD screen numeral show no change.The thermometer of forming by present embodiment gets final product work below illuminance 40Lx.
The II of power circuit described in the utility model also can adopt following connected mode to realize: the positive and negative electrode of the solar cell SP among the described power circuit II is connected to the VDD and the VSS end of single-chip microcomputer; The OUT end of voltage detecting sheet U1 is connected the RES end of single-chip microcomputer, and its vdd terminal is connected with solar cell SP positive pole, the GND end is connected with solar cell SP negative pole.When the output voltage of electric solar energy battery did not reach the threshold voltage of voltage detecting sheet, its inner electronic switch made OUT link to each other with GND, made the RES end of single-chip microcomputer be low level.When the output voltage of solar cell reaches the threshold voltage of voltage detecting sheet, the conducting of voltage detecting sheet, the RES end of single-chip microcomputer is for high level, so single-chip microcomputer resets and starts working.The light emitting diode forward is connected the two ends of solar cell SP, makes the voltage of solar cell be unlikely to too high; Capacitor is connected in parallel on the two ends of solar cell, plays the energy storage effect, for the sampling transient state provides bigger electric current.The about 80Lx of thermometer general work illumination by the present embodiment composition.
Solar cell described in the utility model is a non-crystal silicon solar cell; The model of described voltage detecting sheet U1 is R3111H131C; The model of described single-chip microcomputer is AX1002.
Principle of work of the present utility model is as follows: provide the energy by solar powered power supply, single-chip microcomputer is accepted the signal that the temperature sensor collection comes by the I/O mouth, after computing, analysis, processing, outputs to the I/O mouth, demonstrates temperature with LCD.
Advantage of the present utility model is: not only have the energy-saving and environmental protection advantage, and can be for a long time, continuous working stably.
(4) description of drawings
Fig. 1 is a shape assumption diagram of the present utility model.
1 is LCD display among the figure, the 2nd, and solar cell, the 3rd, housing, the 4th, temperature sensor.
Fig. 2 is a theory diagram of the present utility model.
Fig. 3 is the circuit theory diagrams of first kind of embodiment of the utility model.
Fig. 4 is the circuit theory diagrams of second kind of embodiment of the utility model.
(5) embodiment
The utility model is done with detailed description below with reference to embodiment (accompanying drawing):
Embodiment 1:
Shown in Fig. 2,3, present embodiment comprises with model being I/O mouth input end temperature sensor III that is connected and the LCD display IV that is connected the I/O mouth output terminal of single-chip microcomputer I of the single-chip microcomputer I of AX1002, and the power circuit II that is connected with the VSS end with the vdd terminal of single-chip microcomputer I, described power circuit II comprises solar cell SP, LED, the electrochemical capacitor C that is connected with parallel way, and the model that is connected between solar cell SP positive pole and the negative pole is the voltage detecting sheet U1 of R3111H131C; The vdd terminal of voltage detecting sheet U1 among the described power circuit II is connected with solar cell SP positive pole, and its GND end is connected with solar cell SP negative pole, and the OUT end is connected the vdd terminal of single-chip microcomputer, and solar cell SP negative pole is connected the VSS end of single-chip microcomputer; Temperature sensor RT inserts the THER end and the REF end of single-chip microcomputer.
Embodiment 2:
As shown in Figure 4, the II of power circuit described in the present embodiment adopts following connected mode to realize: described power circuit II comprises solar cell SP, LED, the electrochemical capacitor C that is connected with parallel way, and is connected the voltage detecting sheet U1 between solar cell SP positive pole and the negative pole; Wherein the positive and negative electrode of solar cell SP is connected to the VDD and the VSS end of single-chip microcomputer; The OUT end of voltage detecting sheet U1 is connected the RES end of single-chip microcomputer, and its vdd terminal is connected with solar cell SP positive pole, the GND end is connected with solar cell SP negative pole.
Claims (5)
1, a kind of solar powered LCD digital display thermometer, it comprises the temperature sensor III that is connected with the I/O mouth input end of single-chip microcomputer I and is connected the LCD display IV of the I/O mouth output terminal of single-chip microcomputer I, and the power circuit II that is connected with the power input of single-chip microcomputer I, it is characterized in that: described power circuit II comprises solar cell SP, LED, the electrochemical capacitor C that is connected with parallel way, and is connected the voltage detecting sheet U1 between solar cell SP positive pole and the negative pole.
2, solar powered LCD digital display thermometer according to claim 1, it is characterized in that: the vdd terminal of the voltage detecting sheet U1 among the described power circuit II is connected with solar cell SP positive pole, its GND end is connected with solar cell SP negative pole, the OUT end is connected the vdd terminal of single-chip microcomputer, and solar cell SP negative pole is connected the VSS end of single-chip microcomputer.
3, solar powered LCD digital display thermometer according to claim 1 is characterized in that: the positive and negative electrode of the solar cell SP among the described power circuit II is connected to the VDD and the VSS end of single-chip microcomputer; The OUT end of voltage detecting sheet U1 is connected the RES end of single-chip microcomputer, and its vdd terminal is connected with solar cell SP positive pole, the GND end is connected with solar cell SP negative pole.
4, solar powered LCD digital display thermometer according to claim 1, it is characterized in that: described solar cell is a non-crystal silicon solar cell.
5, solar powered LCD digital display thermometer according to claim 1, it is characterized in that: the model of described voltage detecting sheet U1 is R3111H131C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02284291 CN2578806Y (en) | 2002-11-20 | 2002-11-20 | LCD digital thermometer with solar power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02284291 CN2578806Y (en) | 2002-11-20 | 2002-11-20 | LCD digital thermometer with solar power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2578806Y true CN2578806Y (en) | 2003-10-08 |
Family
ID=33745675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02284291 Expired - Fee Related CN2578806Y (en) | 2002-11-20 | 2002-11-20 | LCD digital thermometer with solar power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2578806Y (en) |
-
2002
- 2002-11-20 CN CN 02284291 patent/CN2578806Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHUNCHANG INSTRUMENTS + METERS CO., LTD., ZHENGZHO Free format text: FORMER OWNER: HUALING INSTRUMENT + METER CO., LTD., ZHENGZHOU Effective date: 20111026 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 450002 ZHENGZHOU, HENAN PROVINCE TO: 450000 ZHENGZHOU, HENAN PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20111026 Address after: 450000 Zhengzhou economic and Technological Development Zone, Henan, the main street, building eighth, No. 2218 Patentee after: Howe Precision Industrial Inc. Address before: 450002, Henan province Zhengzhou City Jinshui District temple Li Village (Institute of Light Industry Institute) Patentee before: Hualing Instrument and Gauge Co., Ltd., Zhengzhou |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20031008 Termination date: 20111120 |